Question

【题目】He _____ run and walk since he left hospital last month.

A. will be able to B. is able to

C. has been able to D. was able to

Answer 1

【答案】C

【解析】

句意：自从上个月出院以来，他一直就能跑步和走路。由句子since he left hospital last month. 可知，主句的时态用现在完成时，A. will be able to 一般将来时；B. is able to一般现在时；C. has been able to现在完成时；D. was able to一般过去时。故选C。